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Low-temperature synthesis method of semiconductor cerium dioxide nanocrystal

A technology of ceria and synthesis method, applied in ceria/ceria, nanotechnology, nanotechnology and other directions, can solve the problems of harsh preparation conditions and large particles, achieve uniform grain size, reduce formation temperature, reduce The effect of size

Pending Publication Date: 2022-07-12
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of ceria mainly has the following problems at present: 1. the preparation conditions are harsh
Usually, most of the methods for synthesizing ceria nanocrystals require high temperature (temperature greater than 400 degrees Celsius) or hydrothermal environment; 2. The prepared particles are relatively large, usually at the micron level

Method used

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  • Low-temperature synthesis method of semiconductor cerium dioxide nanocrystal
  • Low-temperature synthesis method of semiconductor cerium dioxide nanocrystal
  • Low-temperature synthesis method of semiconductor cerium dioxide nanocrystal

Examples

Experimental program
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Embodiment approach

[0035] The third embodiment of the present invention provides an application of the above-mentioned semiconductor ceria nanocrystal as an active component in a photocatalyst.

[0036] The fourth embodiment of the present invention provides a photocatalyst comprising an active component and a carrier, the carrier supports the active component, and the active component is the above-mentioned semiconductor ceria nanocrystal.

[0037] In order to enable those skilled in the art to understand the technical solutions of the present invention more clearly, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.

Embodiment 1

[0039] 1. Use ultrapure water to prepare 1mM cetyltrimethylammonium bromide (CTAB) solution and 0.1mM AgNO solution respectively. 3 Solution and 0.01M Ce(AC) 3 solution.

[0040] 2. Mix 50 μL CTAB solution, 200 μL AgNO 3 solution and 200 μL Ce(AC) 3 The solution was successively added to 9.55 mL of ultrapure water and sonicated uniformly.

[0041] 3. Place the solution obtained in step 2 in an oven at 100°C and let it stand for two hours. The taken-out mixed solution was centrifuged at 5000 rpm, and the supernatant was removed to obtain the product ceria.

[0042] The XPS characterization results of the product ceria show that the product prepared in this example is ceria, such as figure 1 shown.

[0043] The morphology of ceria is as Figures 2 to 3 As shown, the electron microscope image shows that the size of the ceria crystals prepared in this example is uniform, and each ceria nanocrystal is composed of several sheet-like structures, and the size is about 30 nm.

Embodiment 2

[0045] 1. Use ultrapure water to prepare 1mM cetyltrimethylammonium bromide (CTAB) solution and 0.1mM AgNO solution respectively. 3 Solution and 0.01M Ce(AC) 3 solution.

[0046] 2. Mix 50 μL CTAB solution, 200 μL AgNO 3 solution and 200 μL Ce(AC) 3 The solution was successively added to 9.55 mL of ultrapure water and sonicated uniformly.

[0047] 3. The solution obtained in step 2 was placed in an oven at 90°C and allowed to stand for two hours. The taken-out mixed solution was centrifuged at 5000 rpm, and the supernatant was removed to obtain the product ceria.

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Abstract

The invention belongs to the technical field of advanced materials, and relates to a low-temperature synthesis method of a semiconductor cerium dioxide nanocrystal. The method comprises the following steps: adding cerium acetate, cetyltrimethylammonium bromide and silver salt into ultrapure water, uniformly mixing, heating to the temperature not higher than 100 DEG C, reacting, and removing a solution after the reaction, thereby obtaining the cerous acetate / cetyltrimethylammonium bromide composite material. According to the method disclosed by the invention, the nano-sized cerium dioxide nanocrystal can be prepared in a low-temperature (not higher than 100 DEG C) aqueous solution by utilizing an auto-oxidation reduction method, the prepared cerium dioxide consists of some flaky particles, and the size is as low as about 30nm.

Description

technical field [0001] The invention belongs to the technical field of advanced materials, and relates to a low-temperature synthesis method of semiconductor ceria nanocrystals. Background technique [0002] The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not necessarily be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. [0003] Ceria is a very important rare earth oxide, which is widely used in catalysis, fuel cells, biology and other fields. However, the current preparation of ceria mainly has the following problems: 1. The preparation conditions are harsh. Most of the methods for synthesizing ceria nanocrystals require high temperature (temperature greater than 400 degrees Celsius) or hydrothermal environment; 2. The prepared particles are relatively large, usually in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/235C01F17/10B82Y30/00B82Y40/00
CPCC01F17/235C01F17/10B82Y30/00B82Y40/00C01P2004/64C01P2004/03C01P2002/85C01P2004/52Y02W10/37
Inventor 贾恒磊丁聪鞠亚菲
Owner SHANDONG NORMAL UNIV